无煤柱采煤时,无维修沿空留巷是最迫切的问题。南库兹巴斯各矿所进行的研究表明,沿空留巷工艺未能推广。妨碍采用沿空留巷工艺的主要原因是,护巷工艺所需材料及工程量耗费巨大,效益差,缺乏有关护巷工艺方面科学而合理的措施。莫斯科矿业学院与《巴达耶夫斯卡娅》煤矿协作,制定了利用OKC—2综合机组和定型节式折腿支架(СПКМ)的护巷工艺。大量研究表明,回采巷道顶板岩石中应力和变 No pillar coal mining, maintenance-free gob-side entry is the most pressing issue. Research conducted by the South Kuznets and Mines shows that the process of gob-side entry retaining has not been promoted. The main reason that hinders the process of retaining gob-side entry is that the amount of materials and works required for roadway protection is huge, the benefits are poor, and there is a lack of scientific and reasonable measures concerning laneway protection. In collaboration with the “Badakhovskaya” coal mine, the Moscow Institute of Mines has developed a lane-keeping technology using the OKC-2 integrated unit and the fixed knuckle bracket (СПКМ). Numerous studies have shown that stress and strain in the roof rock of mining tunnels